Effects of different plant extracts at various dietary levels on growth performance, carcass traits, blood serum parameters, immune response and ileal microflora of Ross broiler chickens

A study was conducted to evaluate the effects of different plant extracts (common nettle, coriander, dill and thyme) at various dietary levels (0, 150, 300 and 450 mg/L) on growth performance, carcass traits, blood serum parameters, immune response and ileal microflora of 650 male Ross chickens (13 treatment groups; five replicates/treatment group; 10 birds/replicate) in a 42-day trial. Plant extracts were added to drinking water. Supplementation, except for coriander, increased feed intake (p